build(deps): poetry: Lock at click 8

shell_completion requires new click version

See also:
- https://click.palletsprojects.com/en/8.0.x/changes/#version-8-0-0
- Fixes #775

Author: tony

poetry.lock

@@ -46,7 +46,7 @@ tmuxp = 'tmuxp:cli.cli'
 
 [tool.poetry.dependencies]
 python = "^3.7"
-click = ">7,<8.2"
+click = "~8"
 kaptan = ">=0.5.10"
 libtmux = "~0.11.0"
 colorama = ">=0.3.9"